Air-feeding attachment.



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F. N. COOKE.. AIR FEEDING TTAGHMENT. APPILIOATION FILED JAN. 29, 191s.

unirsi) .sTATEs .PATENT OFFICE.

FRANK N. vCOOKE, OF DANVERS, MASSACHUSETTS, ASSIGNOR TO ARABELLA C. COOKE,

` f OF- DANVERS, MASSACHUSETTS. f

AIRFEEDING ATTACHMENT.

Specification of Letters Patent.

Application filed January 2 9; 1913. Serial No. 744,968.

To all whom if may concewi: ,i

Be it known that I, FRANK N. COOKE, a

citizen of the United States,' residing at Attachments; and I do hereby declare the following to bea full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to apparatus for heating the air fed to the furnaces of power and heating plants; and 'it 4consists in the novel construction and combination of the parts hereinafter fully described and claimed, whereby the air is heated to a relatively high temperature before being admitted to the furnace and so t-hat its heated oxygen is utilized to obtain a more perfect combustion of the combustible gases which are usually wasted to a great extent.

' In the drawings, Figure 1 is a horizontal section of a portion of a furnace provided with an attachment for heating the air according to this invention. Fig. 2 is a front- View of the front baille plate. Fig. 3 is a front view7l of the rear baille plate. Fig. 4-

is a cross-section through the two baffle plates, taken on the line -min Fig. 1.

. A portion only of a furnace 2 is shown as the furnace is of any approved construction in which any kind of fuel 'can be burned. This furnace has an opening 3 which may be the usual feed opening or door for fuel, or it may be a special openingforined atl any convenient point. Vlhenv this opening 3 is the feed opening for fuel itis usually provided with a hinged door 4 of any approved make. The opening is rectangular, and the door 4 extends over it and forms a supporting plate foi1 the heating attachment.

'willhe heating attachment comprises two rectangular baffle plates 6 and 14. The' baille plate 6 is provided with projecting flanges 7 which form an unobstructed chamber 8 on its front face- A plate or washer 9 of asbestos orother non-heat-conductin ma'- terial is arranged between the flanges .and the door 4, and the door 4.has an air pening 10 provided with a regulator or -damper 11 in the usual way.' A series of holes 12 is formed through the lower portion if the baille plate 6 for the passage of air. The

rear batileplate 14has projecting flanges 15 on its front facearouiid its-edges, and it has 'also partition plates 17 ,.18 and 1.9 which divide up Vits 'chamberpint'o a tortuous passage "or passages 20. 'The lower partition 'so' plates 17 are arranged. around the air holes 12, and the partitiony plates 18 and 19 are arranged horizontallyabove them with connecting openings at their middle parts and ends alternately, so that the air is forced to follow a verycircuitous course. Air out-let holes 21 are arranged in a row through and at the upper partbf therear baffle plate 14',

and the air passes from the upper convolution of .the tortuous passage 20 -into the 70 combustion chamber of the furnace. A mat or washer 24 of asbestos or other approved material is interposed between the partition plates and flanges of the rear baffle plate and the rear surface of the front balile plate 7'5 `in order to make a sufficiently air-tight ioint.4 v

The baille plates are secured together and to the door, or other part ofthe furnace which supports them, by any approved fastening devices, such as bolts 25. The two 8o `battle plates'forin a pair, and as many similar pairs of baille plates as desired can be'used when bolted together, or a single pair of baille plates can be used. The oxygen of the aii` is heated lto a very highteniperature 8,5

as it passes through the chambers of the .metallic baille plates, and its efficiency in supporting combustion in the furnace chainber is thereby greatly increased.

What I claim is: 1. The combination, with a fire-box hav-v t ing a rectangular opening on one side, and a supporting plate extending over the said opening and provided with an air inlet at its .upper part; of a front baffle plate secured to the rear side `of the supporting plate and having flanges at' its edges which form an unobstructed air chamber against the supporting plate and having a row of outlet V holes in its back below the level of the air f lO( inlet; and a rear baffle plate secured to the rear side of the front baille` plate and having a row of outlet holes in the upper part 'of its back, and having flanges at itsedges and partition plates projecting fromA its .1'3

front face and 'forming with the back the front baille plate a tortuous air passa e extending between the outlet holes of t e front and rear Ybattle plates respectively.

2. The combination, with adire-box hav- V11 Patented Nov. 25, i913.

ing a. rectangular opening on one side, and a supportingA plate extendlng over the sald of its back, and having-flanges at its' edges and partition plates projecting from itsl ii-cnt face and arranged horizontally in two series and having openings at their middle parts and ends alternately and forming with the back. of the front battle plate a t-ortuous air passage extending between the outlet holes of the front and rear baille plates respectively.

In testimony Whereoi:l I have aiiixed my signature in the presence of two Witnesses.

FRANK N. COOKE.

-Witnesses:

FRANCIS H. CAsniN, ELISHA lvl. BEVINSt Copies of this patent may ne obtained for `five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

